Spjjtk-plux



. To all whom t may concern.'

Josnrn s. raum, or nLoor/rrinnn, New Jansen?.

Seann-enne.

Lease.

Specification of Letters Patent.

Patented duly d. i919.

Application med January 2G, 1918. Serial No. 213,956.

Be it known that l, JOSEPH S. FAUTH, a citizen of the United States,residing at Bloomfield, in the county of Essex and State of N ew Jersey,have invented new and useful improvements in Spark-Plugs, of which thefollowing is a specification.

This invention relates to improvements in spark plugs adapted for use inigniting the gasn internal. combustion engines.

One object of the invention is to provide an improved forni of sparkplug which embodies a movable electrode which is actuated by thevibratory action of the engine and also by the inrush and explosion or"the charge, and which prevents the deposition of carbon at the sparkinpoint and thereby readily increases the einciency of the spark plug andof the engine in which the spark plug is used.

Another object of the invention is to provide an improved spark plugvwhich embodies a core or insulatine' sleeve which comprises an innersection or mica and an outer section or member ci filier7 detachablyconnected to themica section by the conducting rod which `forms theinner electrode.

With the above and other objects in view the invention consists in theconstruction, combination and arrangement of devices hereinafterdescribed and claimed.

ln the accompanying` drawings Figure l is a vertical central sectionalview ot a s arl; plug constructed and arranged in accordance with myinvention.

Fig. 2 is a bottom plan of the same.

Fig. 3 is a detailed sectional view ci the same on a larger scale.

The base l of the spark plug is here shown as provided with the usualscrew plug 2- and with the usual polygonal head 3 which may vbe engagedand turned by a wrench. at

the inner/end of the screw plug 2 is a cross bar llwhich extendscentrally thereacross,

the said cross bar being provided with a central circular opening 5 thewall ot which is chamfered on opposite sideto form an annularsubstantially knife like edge 6.'

,A movable electrode nut is rovided which is in the shape of a dumb-be l'comprising a ing 5 so -that the said movable electrode. is

loosely mounted in said opening and is adapted to describe oscillatingmotions.

The core of the spark plug' comprises an inner member 10 which is madeof mica and an outer member 1l which is made of fiber. rlhe inner memberis fitted in the base andis formed with an enlarged annular shoulder i2which is engaged and held and firmly clamped in place in the base bymeans of the usual sleeve nut 13. A conductor rod lll.- extendscentrally through the members l0 and 11 of the core and is provided atthe inner ends with an enlarged semi-spherical head l5 which forms anelectrode which is opposed to a movable electrode 8. A jam nut 16, whichis preferably made of brass is screwed to the outer end of the conductorrod and bears on the outer end of the fiber head or electrode i5 of theconductor rod-to firmly and yet detachably secure the meub bers l0 andil oi the core together.

Owing to the construction of the movable electrode with the oppositelyarranged head 9, and the provision of the oppositely beveled side of thewall of the'opening 5 in which the stem or shank of the said elec trodeis mounted, the said velectrode is balanced and is caused to move andswing from side to side when the engine is in operation and tocontinually strike the electrode 15 and thereby yprevent the depositionof carbon thereon.

Having thus described my invention l claiin:` v

l.- A spark'plug having a fixed electrode and also having 'a bar spacedfrom said fixed electrode and provided with an opening, and a movableelectrode comprising a shank and enlarged heads at the opposite ends ofthe shank, said shank extending through and being loosely mounted insaid opening for oscillation and the heads being on opposite sides ofsaid bar.

Theil 2. A spark plug having :L fixed electrode movable electrodecomprising a shank eX- and also having e bar spaced from said fixedtending through said opening and loose electrode and provided with acircular opentherein and enlarged heads at the ends of 1 ing oppositesaid fixed electrode, the Wall' of said shank. l 2

5 seid opening being beveled on opposite sides, In testimony whereof Iafx my signature.

and a, movable electrode loosely mounted `for oscillatory movement insaid opening, said JOSEPH S.r FAUTH.

